Air-compressor.



W. REAVELL. AIR-COMPRESSOR. APPLICATION man MAYI. r911.

1,277,752. Patentedsept. 3,1918.

2 SHEETS-SHEET I.

W ,Jiwerzlin,

W. REAVELL.

AIR COMPRESSOR.

APPLICATION men MAY 1. I917.

Patented Sept. 3, 1918.

' To all whomit mag concern "sure and yet be of simple,

- .2 TED s'rAT s 1 .4mm on Io 1 WILLIAM REAVELL, or Irsw oIr'EIvcLAivD.

AIR-coMrREs'soIt.

Be it known that I, VILLIAM' Ri AvnnL, a subject of the King of Great Britain and Ireland, residing at Ipswich, in the county of Suffolk, England, have invented Iniprovements in Air-Compressors, of which the following is a specification.

This invention has referenceto improvements in air compressors of the kind in whichtwo compression"cylinders are arranged in line oppositeeach other-and are fitted with pistons reciprocated by a hand lever, anobject being to provide a compressor of this kind which shall be capable of compressing air to a very considerable presstrong and efficient construction.

One of our improvements comprises-an arrangement wherein the cylinders are ,car-' ried by a suitable base piece or carrier, which for example may be clamped, or boltodor otherwise secured to a suitable support or which may be in the form of a saddle with hinged j aw 0r bridle adapted to firmly embrace a bar 'ortu'be, and the lever is so formed as to span the cylinders and is pivoted to sald base piece 01*.(3211116101 to the cylinder casting, the. limbsof the lever be ing slotted to receive the ends'of across head or pin carried by the pistons. 7

Another improvement comprises a convenient construction and arrangement of two stage compressor with oppositely arranged cylinders and withpistons actuated by alever in the manner referred to.

To enable the invention to be more clearly understood, constructions of two stage compressors according thereto will now be described with reference to the accompanying illustrative drawings.

Figure 1 is a longitudinal section, ofone construction of two stage compressor according to this 1nventlon;

Fig. 2 is a transverse sectionon the line A A Fig. 1; and Figs. 3 and- 4 are hori-. 'zontal sections throrighthe low and high pressure cylinder covers respectively.

Figs. 5 and 6 show in end and sideelevation respectively a modified construction,

Referring to Figs. 1 to 4:, a and b are the low and high pressure cylinders respectively and are formedof different diameters in the opposite end portions of a 'castingc hav 1 ing intermediate of its cylinders longitudinal slots (l; the pistons e and are of the plunger type formed in one piece having Specification of Letters Patent.

ter line of the cylinders.

midwayio-f its lllgth a transverse hole which i is bushed to receive a crosshead .Pinflthat extends through the slots d and is held as to embrace'the guntrail as shown-or the saddle proper may have hinged to one slde a correspondlngly curved aw, wh ch can'be held in its closedposition by a pin passing through holes in its free'end andthe other side of the saddle and which is fitted with a set screw for drawingth'e saddle down tightly on to its support. Insome cases 95- pe'cially'in the case of a saddle made in? halves and permanently fixed to the gun trail as shown the cylinder casting may be detachably secured to the saddle by inter rupted interlocking flanges on the respective; parts; as shown, a' circular boss i.having four or other convenientnumber of radial lugs 2' which will pass through:correspond ing gaps in the inwardly extendingflange ofa hollow base 72 at the top of the saddle, and, by partially turningthe cylinder cast-- ing', will engage beneath said flange and,

firmly secure the casting in its right position, locking being effected by cam shaped lugs} or Patented sepe'aie sg Application inedzna -v, 1917. Seria1-No.-1 66,962. v x I a hooks Z pivoted on'the boss of the cylinder.

castingljand adapted to engage studs;

on the saddle. The'actuat ing lever a isf'pivf oted to the lower part of the saddle by; studs 0' fixed byscrews p in the ends of its fork" arms and extending into alined holes in bosses q atthe sides voffthe saddle, the studs being withdrawable. The bifurcated por-' tion of the lever-n spans the saddle hand the cylinder casting mind is formed with guide slots 1' to receive the ends of the icrosshead pin g; the end portions ofthe pin fare'flate tened where they engage in the guide slots and the fork arms of the lever are sufliciently splayed that, on being passed over the cylinders, the flattened ends of the pins will-enterthe guide slots. The upper [part ofthe forked lever is formed as a shouldered socket to receive a bar or tube which may be fixed by a set screw, the axis of'the socket lyingin the plane containing the gen;

The cylinder heads (Figs. 3 and 4) are formed with suction and delivery passages s and t and valves a and o thelatter preferably being interchangeable; the delivery passage 6 of the low pressure end is connected to the suction passages of the high pressure end by a straight tube to extending alongside the cylinders exposed to the air, or

through the water acket space where one is provided; a

The air inlet and outlet of-thecompressor may be provided with plugs or caps as shown forfexclusion of dirt when the compressor is not in use,v t s Inithe construction illustrated in Figs. 5

and 6, and more especially suitable for the larger. s zes, 1 the actuating lever 001111311888" two members 1 which are mounted on the end'portions of a'pin 2 journaled in a hearing 3 formed in one with upwardly extending webs 4 on the cylinder casting, the lower ends of these members being slotted at 5 to engage the flattened end portions of the crossheadpin g and the upper ends being formed as sockets into which take the limbs of aU shaped bar or tube 6, which thus holds the members in position on tthe fulcrunr pin 2; mounted to turn on the horizontal middle portion of the U shaped bar or tubeis a bar 7 with tubular T pieces at itsends into which can be fitted cross bars Aswill be understood, this lever arrange-V so that four men,ltwo toeach cross bar, can

operatethe compressor from opposite sides.

ment can be easily taken to pieces and packed in a small space.

or as shown in Figs. ,5 and 6 the fiat surface may be the face of a hollow boss 70 gapped to receive lugs/Z on a boss 71 on the cylinder castingasalready referred to.

v, WVhere the cylinder casting has to be mounted so that the cylinder axis is transverse ofa sloping support such as a gun trail,

as in Figs. 5 and 6, the boss or base portion 2' of the casting may be correspondingly sloped as shown so that the operating lever will extend vertically.

, WVhat I claim is I 1. .An air compressor of the kind referred to comprising a casting'formed with two cylinders in line in its opposite end portions, connected valveless pistons in said cylinders,

abase piece or carrier, interrupted interlocking flanges detachably securing the cylning said cylinders and having slotted arms,

"a fulcrum on which said lever is detachably mounted, a cross head pin *carried by the pistons and engaging at its ends the slots in the lover arms, substantially as described.

' 2. A two-stage air compressorof the type referred to comprising a casting having cylinders of diflerent'diameters formed in its opposite end portions and longitudinal slots in opposite sides of its intermediate portion, a base piece or carrier to which said casting is detachably secured, valveless pistons fit-' ting said cylinders and formed in onepiece with a transverse hole midway of its length, a crosshead pin held in said hole-and havingits ends, which project through said slots, flattened, a bifurcated actuating lever adapted to span the cylinder casting and formed with guide slots in its fork arms, which slots receive and guide the flattened ends of the'crossheadpin,and a fulcrum on which said lever is detachably mounted, substantially as described.

'3. A two-stage air compressor of the type referred to comprising a casting having cyl-V inders ofdifferent diameters formed in its opposite end portions, a base piece or carrier to which said casting is detachably secured, heads to said cylinders, suction and delivery passages and valves in said heads, a tubular connection between the low pressure delivery passage and the high pressure suction passage, longitudinal slots in the opposite sides of the cylinder casting intermediate of the cylinder, valveless pistons fitting said cylinders and formed in one piece with a transverse hole midway of its length, a crosshead pin heldin said hole and having its ends, which project through said slots, flattened, abifurcated actuating lever adapted to span the cylinder casting and formed with guide slots in its forkarms,-which slots receive and guide the flattened projecting ends of the cross'head pin, and a fulcrum on which said lever is detachably mounted, substantially as described.

4. A twostage air compressor according to claim 2 wherein the slotted fork arms of the bifurcated actuating lever are disposed atanangle to each other so that, on being passed over the cylinder casting the flattened ends of the crosshead pin will enter the guide slots, substantially as described,

, Signed atRanelagh forks, Ipswich, this 16th day of April, 191 j g WILLIAM REAVELL. WVitnesse's: V c

F. E. DUNNETT, S. WOOLNER.

Copies of this patent may beobtained for five cents each, by addressing the Commissioner of Patents, Washington, 13.0. 

